TREA

John J. Merck Jr.

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  • Medfield, MA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Hardness tester
    • Patent number 6,247,356
    • Issue date Jun 19, 2001
    • Instron Corporation
    • John J. Merck
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Penetration hardness tester
    • Patent number 6,142,010
    • Issue date Nov 7, 2000
    • Instron Corporation
    • John J. Merck
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Penetration hardness tester
    • Patent number 5,616,857
    • Issue date Apr 1, 1997
    • Instron Corporation
    • John J. Merck
    • G01 - MEASURING TESTING